Putting a rookie quarterback behind an offensive line that struggles in pass protection, and in an offensive scheme that isn’t quite sure how to protect the passer, is a perfect storm for what we’re seeing transpire with the Chicago Bears this season. The Bears lead the league both in sacks allowed (26) and in sack percentage (12.6), and they are on a pace to have the worst sack percentage in 15 years. The 2006 Oakland Raiders were sacked 13.0% of the time with rookie Andrew Walter starting 8 games at quarterback and Aaron Brooks starting the other 8 in his final season in the NFL.